Cap for writing tools



FIG. 1 is a perspective view of a cap for writing tools showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view; and

FIG. 7 is a side elevational view of my design, in combination with a writing instrument depicted in broken lines for illustrative purposes only and which forms no part of the claimed design. 

The ornamental design for a cap for writing tools, as shown and described. 